#app {
    width: 100%;
    height: 100%;
  }
  #app {
    background-color: #f0f0f0;
    display: flex;
    flex-direction: column;
  }
  .header {
    flex: 0 0 60px;
    height: 60px;
    padding: 0 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid lightgray;
  }
  .content{
    display: flex;
    flex: 1;
    overflow: auto;
  }
  .left{
    border-right: 1px solid lightgray;
    flex: 0 0 140px;
    height: 100%;
   
 
    min-width: 0;
    padding: 8px;
    overflow: auto;
  }
  .right{ 
    flex: 1;
    padding: 12px;
    position: relative;
   
    overflow: auto;
   
  
  }
  .right-top{
    position: sticky;
    top: -12px;
    width: 100%;
    height: 60px;
    background-color: #fff;
    margin-bottom: 12px;
    padding: 12px;
    display: flex;
    align-items: center;
    border: 1px solid red;
  }
  .right-centert{
    background-color: #fff;
    padding: 12px;

  }